the coolant, open the cap engine cold top it off, then run it at idle till the fans come on, if the coolant drops, top it off again, that would be the t stat opening up.

then open the bleeder screw on the t stat housing and open it till just coolant comes out, it might bubble air for a bit. top off the rad if need be, cap it, drive it, next morning check it, top off if needed. id check it the next few mornings to make sure it full.

fill your over flow if its not to the line as well.